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Two Starting Electrons to Work
Three Electron Tubes
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alternating current amplifier tube anode antenna audio signal beam of electrons beam of light bounce broadcast called carrier wave cathode Chapter color current flowing dots earth elec electric current electromagnetic electron beam ELECTRON GUN electron tube electronic devices electrons flow energy equipment fast faster filament film flow of electrons free electrons frequency gas atoms glass grid hear heat high-frequency hot cathode infrared integrated circuits keep laser beam lidar light waves look machine magnetic metal microcircuits molecules move negative electricity nucleus number of electrons ordinary particles phototube picture poor conductor positively charged protons pulled pushed radar radiation radio waves rays record reflected scans scientists sending shorter silicon slice sound waves space speed station tape target television camera things thousands thyratron tiny transistor tricity trons TV set ultraviolet vacuum tube very-high-frequency vibrate voltage wavelengths whirl wire X rays